[Q] Problems in answering incoming calls

[PrinzEugen]

I've got a problem when answering the call. Most of the time when I take the call the other participant cannot hear me unless 3-5 secs pass. It is as though I put an incoming call on hold and after 3-5 secs pass I am able to continue conversation normally. During that mute period I keep saying 'hello, hello" but the caller can't hear me. I've got stock rom, no modification, regular updates but this problem is persistent. This also happens from time to time when I make an outgoing call but it is more frequent in incoming calls. Please help. Thanx!